Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/265—Support structures or bases for apparatus, e.g. frames
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/02—Small extruding apparatus, e.g. handheld, toy or laboratory extruders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/256—Exchangeable extruder parts
  • B29C48/2565—Barrel parts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
  • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
  • B29C48/83—Heating or cooling the cylinders
  • B29C48/834—Cooling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/92—Measuring, controlling or regulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
  • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders

Definitions

• the invention relates to an extruder with an extruder housing, in which a conveyor channel is formed for a medium to be extruded, in which at least one conveyor screw is arranged, with a cooling device for the
• Extruder housing which has at least one formed in or on the extruder housing cooling line, which is flowed through by a cooling fluid, and with an electronic device for controlling and / or regulating the operating states of the extruder, which housed in an electronics housing is.
• An extruder is a conveying device which by means of a screw conveyor presses out a solid, liquid or pulverulent medium, in particular under pressure and at high temperature, from a shaping opening. Processing extruders and processing extruders can be distinguished. A processing extruder is essentially for forming, while a processing extruder is used for chemical and / or physical modification, such as mixing, degassing, or testing Substances serves. Both types of extruders should be covered according to the Invention.
• An extruder has an extruder housing in which a mixing or conveying channel is formed for the medium to be conveyed and extruded.
• a mixing or conveying channel is formed for the medium to be conveyed and extruded.
• the conveying channel is at least one screw conveyor is arranged under close fit, which is rotationally driven, whereby the medium is transported along the winningka channel.
• An extruder may comprise one, two or even more screw conveyors, which are usually arranged parallel to each other and depending on the nature of Me mediums and the promotion are either driven in the same direction or in opposite directions.
• the extruder housing During operation, the extruder housing must be temperature controlled and cooled and / or heated.
• a cooling device for the extruder housing is provided, which cools the extruder housing at least in sections and in particular in several separately controllable sections.
• the term "cooling" is understood to mean the lowering of the temperature by at least one small temperature difference.
• a known cooling device comprises a tank, in which a cooling fluid, usually a cooling fluid, is accommodated, which is held in a known manner at a predetermined temperature. From the tank leads a supply line to the extruder housing, in which at least one cooling line is formed. From the extruder housing leads ei ne return line back to the tank, wherein the cooling fluid can be promoted by means of a pump in a cooling circuit, which includes the tank, the supply line, the cooling line and the return line.
• an electronic device is provided which is accommodated in an electronics housing. The electronic device may overheat during prolonged operation, and it is therefore known to cool the electronic device as well.
• a fan which blows on the electronic components and thus subjected to ambient air, whereby heat is removed.
• cooling fins of conventional construction may be provided on the electronics housing. The cooling fins ensure that the electronics housing has a large surface area and thus more easily releases excess heat.
• cooling of the electronic device is sufficient in many cases, it involves the problem that it is hygienically critical, which is particularly the case when using the extruder in rooms in which there are increased hygienic requirements, for example in the pharmaceutical industry. ceutical industry, can cause problems.
• the fan for cooling the electronic device impurities are distributed over a large area in the environment, which is unhygienic. In the cooling fins or similar air shafts, over time, contaminants that can lead to contamination and which have to be removed with great effort are deposited.
• the invention has for its object to provide an extruder of the type mentioned, meets the increased hygienic requirements.
• the basic idea is to carry out the cooling of the electronics housing and thus of the electronic device likewise with that cooling device which is provided for the cooling of the extruder housing.
• ventilators which supply the electronic device with an air flow of ambient air and external cooling ribs can be dispensed with, so that the danger of hygienically critical conditions of the extruder is avoided.
• the cooling device has a supply for the cooling fluid, a supply line leading from the supply line to the cooling line, a return line leading from the cooling line to the supply line, and a pump.
• a supply line leading from the supply line to the cooling line leading from the supply line to the cooling line
• a return line leading from the cooling line to the supply line leading from the cooling line to the supply line
• a pump Alternatively, however, it is also possible not to return the cooling fluid from the cooling line to the reservoir, but to dissipate it, ie. deliver to the environment or drain, so that no cooling fluid circuit, but a cooling fluid passage is given.
• the supply line and / or the return line run through a component which forms at least a portion of the electronics housing or is in direct contact with the electronics housing.
• the component is also cooled with respect to the ambient temperature. If the component forms a portion of the electronics housing, this is achieved by the fact that the electronics housing is cooled.
• the extruder is arranged with the electronics housing in a different space than the supply for the cooling fluid and / or the pump, which is particularly desirable in applications in pharmaceutical production, for example in clean rooms.
• a cooling fluid such as water, or a gas, in particular air, can be used.
• the supply of the cooling fluid to the extruder housing or to the component and the discharge of the cooling fluid can take place in a uniform cooling circuit.
• two cooling circuits connected in series wherein the heat or cold transition between the two cooling circuits takes place by means of a heat exchanger.
• the component has projections and in particular cooling fins which protrude into the interior of the electronics housing. These projections or cooling fins can not be polluted because they are in the interior cavities of the electronics housing are arranged, which is preferably completely encapsulated from the environment.
• the extruder housing may be releasably secured to a frame member or a bearing member so that it can be replaced.
• the cooled component is a bearing part which supports the extruder housing.
• the electronics device receiving the interior of the electronics housing is largely sealed from the environment and in particular completely encapsulated. In this way it is reliably avoided that contaminants can enter the electronics housing. Furthermore, it is possible for electronic housings to be sprayed with a cleaning fluid for cleaning purposes without the risk of damage to the electronics.
• a fan may be arranged in the electronics housing. This alone serves to circulate the air within the electronics housing, without any air exchange with the surrounding atmosphere takes place.
• Fig. 1 is a schematic representation of an extruder with a cooling device according to a first embodiment
• Fig. 2 is a schematic representation of an extruder with a cooling device according to a second embodiment.
• an extruder 10 is shown schematically, which has an extruder housing 11 in which a delivery channel 12 is formed.
• the extruder housing 11 is mounted on a bearing part 26 and releasably secured thereto in a manner not shown.
• an electric heater 27 is shown only schematically, with which the extruder housing 11 is heated.
• a further component 21 is arranged, which may be, for example, a further bearing block.
• a cooling device 20 for the extruder housing 11 comprises a reservoir 14, for example a tank for a cooling fluid F, from which a supply line 15 passes through the component 21 and through the bearing part 26 into the extruder housing 11, where it passes into a cooling line 24 to which a return line 16 connects, which also passes through the bearing part 26 and through the component 21 and opens again in the supply 14.
• a cooling line 24a through which the cooling fluid flows, can be formed in the bearing part 26 immediately below the extruder housing 11.
• a pump is arranged, by means of which the cooling fluid F in the supply line 15 to the extruder 11, through the local cooling line 24 or 24 a and in the return line 16 back can be transported to the stock 14.
• the cooling device 20 it is possible to set and influence the temperature of the extruder housing 11 in the desired manner.
• An electronic device 18 controlling or regulating the operating states of the extruder 11 is accommodated in an interior space 22 of an electronics housing 19, which is encapsulated with respect to the surrounding atmosphere.
• the component 21, which is penetrated by the supply line 15 and the return line 16 forms in the illustrated embodiment, a wall of the electronics housing 19 and has projections in the form of cooling fins 25, which protrude into the interior 22 of the electronics housing.
• a rotationally driven fan 23 is provided, by means of which the air in the interior 22 of the electronics housing 19 can be circulated, but preferably an air exchange with the surrounding atmosphere is completely avoided.
• Cooling fluid F through the supply line 15 and through the return line 16. In this way, the component 21 and the bearing member 26 are cooled. Since the component 21 is a part of the electronics housing 19, this is also cooled in the desired manner, wherein the heat exchange is improved to the interior 22 of the electronics housing 19 via the cooling fins 25.
• FIG. 2 shows an alternative embodiment of the extruder, wherein the exuder 11 and its cooling device 20 have basically the same structure as in the exemplary embodiment according to FIG.
• the component 21, to which the electronics housing 19 is connected simultaneously also forms the bearing part 26 on which the extruder 11 is mounted, ie the component 21 and the bearing part 26 are combined and formed only by a single part.
• the electronics housing 19 is preferably completely encapsulated with respect to the environment and has a fan 23 in the interior 22.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Clinical Laboratory Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47010485

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (3)

Citations (7)

Family Cites Families (26)

• 2011
  • 2011-09-30 DE DE102011114576A patent/DE102011114576A1/de not_active Ceased
• 2012
  • 2012-09-21 EP EP12770421.1A patent/EP2760659B1/de active Active
  • 2012-09-21 JP JP2014532265A patent/JP6013490B2/ja active Active
  • 2012-09-21 IN IN3234DEN2014 patent/IN2014DN03234A/en unknown
  • 2012-09-21 US US14/346,933 patent/US9162388B2/en active Active
  • 2012-09-21 WO PCT/EP2012/003948 patent/WO2013045058A1/de active Application Filing
  • 2012-09-21 CN CN201280047585.1A patent/CN103930255B/zh active Active
  • 2012-09-21 PL PL12770421T patent/PL2760659T3/pl unknown

Patent Citations (7)

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